There is a pay gap between men and women in computer programming and software engineering. Women who are classified as "Software Developers" on average make 86 cents for every dollar their male peers make, and women classified as "Programmers" on average make 93 cents on every dollar their male peers make. Here is the data straight from the Bureau of Labor Statistics http://www.bls.gov/cps/cpsaat39.htm and again in a nice little screenshot http://imgur.com/vMoOU (thanks heypel).
This is a challenge to companies which hire either programmers or software engineers to release statistics proving that they treat men and women equally. I understand pay-gap is not the end-all-be-all yardstick of equality so you can break down the statistics by seniority, experience, or any other metrics you like.
The idea is to compile a list of companies which do prioritize treating people equally so that employees can make informed decisions about where they would like to work.